The National Weather Service canceled a Flash Flood Warning for parts of Cocke County, Greene County and Hamblen County after it said TVA inspected the dam.
KNOXVILLE, Tenn. — Update 9/29 at 9:35 a,m.
The Hamblen County Government says that all roads in Southeast Hamblen County are now passable and are reopened. They ask that drivers proceed with caution and note that the bridge on SR-160 over the Nolichucky remains closed while TDOT inspects. The bridge at Spencer Hale Road over the Nolichucky Dam also remains closed. Residents may now re-enter the area.
🚨EMERGENCY UPDATE🚨(9:35 a.m. / 9/29/2024):ROAD OPENING: All roads in Southeast Hamblen County are now passable and...
Posted by Hamblen County Government onSunday, September 29, 2024
Update (4:15 p.m.):
The Tennessee Valley Authority said its Dam Safety team determined Nolichucky Dam is stable and secure. TVA said it is transitioning to an advanced monitoring mode of the dam and exiting the emergency condition. Dam Safety personnel are conducting inspections, the agency said. Crews will do additional safety assessments when the water recedes.
The Tennessee Valley Authority said its River Forecast Center predicted the headwaters of the Nolichucky have crested. Water levels are receding at about one foot every hour.
The National Weather Service canceled its previous Flash Flood Warning for the area at 3:49 p.m. Saturday. It said the dam is no longer at risk of "imminent failure."
TVA said the peak water elevation hit 9.5 feet above the record elevation, set in 1977. The flow rate at 11 p.m. on September 27 more than doubled the flow rate from the previous record.
⚠️(Nolichucky Condition Update)⚠️ Water levels continue to fall at Nolichucky Dam in Greene Co., TN, and after a thorough review by our Dam Safety team, we have determined the dam is stable and secure. We are notifying local emergency management agencies that we are transitioning… pic.twitter.com/yuw8VC4XvP
— Tennessee Valley Authority (@TVAnews) September 28, 2024
Update (10:10 a.m.):
According to the Tennessee Valley Authority, the Nolichucky River has now crested and the dam remains intact. Water is currently receding by approximately one foot per hour and safety teams are in the process of assessing the condition of the dam to determine next steps.
TVA estimates that water levels reached eight feet over the record elevation as a result of Hurricane Helene.
⚠️(Nolichucky Dam Update)⚠️ The Nolichucky River has crested, and the dam remains intact. Water is currently receding by approximately one foot per hour. Our Dam Safety teams are in the process of assessing the condition of the dam to determine next steps.
— Tennessee Valley Authority (@TVAnews) September 28, 2024
We are estimating water… pic.twitter.com/gacmrPmr9Y
Update (9:00 a.m.):
The National Weather Service has canceled the Flash Flood warning extension in Sevier County.
Update (7:13 a.m.):
The National Weather Service has extended a Flash Flood Warning for Jefferson County and Sevier County, lasting until 10:00 a.m. EDT on Saturday.
A Flash Flood Warning has also been extended for Greene County, Cocke County and Hamblen County until noon EDT on Saturday.
------
The National Weather Service said a dam break was reported on the Nolichucky River below the Nolichucky Dam at around 11:35 p.m. EDT on Friday. However, the Tennessee Valley Authority said it activated a condition red warning about an "imminent breach" at the Greene County dam.
Cocke County Mayor Rob Mathis said homes and businesses were being evacuated in the Centerview and Bybee area due to the possible dam failure. He said emergency responders were going door-to-door in the affected area encouraging people to relocate. He also urged people to seek shelter with family and friends and to avoid the area until further notice.
"The breach could occur at any time due to extreme rainfall from the remnants of Hurricane Helene, which is causing record river levels around the region. Potentially life-threatening flooding can occur as far downstream as Douglas Reservoir. Local county emergency management officials are coordinating evacuations as appropriate. Please stay alert for notices from your local EMA and heed all warnings," the TVA said.
The NWS issued a Flash Flood Warning for North Central Cocke County, Southwestern Greene County and Southeastern Hamblen County lasting until 3:45 a.m. EDT.
The weather service said dam operators reported that it failed, and said anyone in the area should move to higher ground. Specific information about the nature of the reported dam failure was not immediately available.
Flooding was already occurring along the Nolichucky River throughout Friday, severely damaging roads and bridges in the upper East Tennessee area. The Tennessee Department of Transportation previously said all roads in upper East Tennessee should be considered potentially hazardous.